DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 최민기 | - |
dc.contributor.author | Lee, Susung | - |
dc.contributor.author | 이수성 | - |
dc.date.accessioned | 2024-07-30T19:31:07Z | - |
dc.date.available | 2024-07-30T19:31:07Z | - |
dc.date.issued | 2024 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1096710&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/321493 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2024.2,[iv, 44 p. :] | - |
dc.description.abstract | Caustic mineral acid catalysts have been gradually replaced with green solid acids such as zeolites in many industrially important reactions. Enormous efforts have been devoted to replacing HCl to produce methylenedianiline (MDA), an essential intermediate in polyurethane production. Unfortunately, limited success has been achieved thus far due to low catalytic activity, selectivity towards the desired 4,4'-MDA, and rapid catalyst deactivation. We currently report that meso-/microporous hierarchical LTL zeolite exhibits high catalytic activity, selectivity, and stability. The one-dimenosional cage-like microporous structure of LTL zeolite can promote the bimolecular reaction between two para-aminobenzylaniline intermediates to selectively produce 4,4'-MDA and inhibit the formation of undesired isomers and heavy oligomers. Meanwhile, the secondary mesopores facilitate mass transfer, resulting in a 7.8-fold higher MDA formation rate compared to solely microporous LTL zeolite. Due to suppressed oligomer formation and fast mass transfer, the catalyst exhibits unprecedented deactivation behavior in an industrially relevant continuous flow reactor. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | LTL▼a위계다공성 제올라이트▼a메틸린디아닐린▼a폴리우레탄▼a고체산 촉매 | - |
dc.subject | LTL▼aHierarchical zeolite▼aMethylenedianiline▼aPolyurethane▼aSolid acid catalyst | - |
dc.title | Hierarchical LTL zeolite as an efficient solid acid catalyst for replacing HCl in the production of polyurethane intermediates | - |
dc.title.alternative | 폴리우레탄 중간체 제조에서 염산 촉매 대체를 위한 고효율 위계다공성 LTL 제올라이트 고체산촉매 개발 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | Choi, Minkee | - |
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